The experts in water heaters and heat pumps have combined the technology of both to bring you a very clever solution - a Hot Water Heat Pump called HydraHeat®. Using the efficiency of heat pump technology, HydraHeat® will heat a home’s water while saving you up to 75% on your water heating costs*. The result is a far more cost-effective and more sustainable solution for the homes of tomorrow.
This energy-efficient hot water heat pump is eligible for an NZ Green Energy Loan - read here for more information.
The HydraHeat® head unit has been designed and built right here in New Zealand for Kiwi conditions, and the whole system is easy to install for any home.
 |
Up to 75% Savings on Hot Water Costs* Provides highly efficient water heating, minimising energy consumption and lowering operating costs. |
 |
Dedicated to Sustainability Powered by only 150g (nominal charge) of high-efficiency R290 refrigerant with low Global Warming Potential and COP of 4.7.** |
 |
Renowned Quality Crafted with exceptional quality by Rinnai New Zealand, the trusted name in total home living. |
 |
HydraHeat® head unit designed and built in NZ Specifically designed for New Zealand climatic conditions (from -10°C to +42°C), as well as coastal locations. Operates in full heat pump mode right down to -10°C without the need for electric boosting. |
 |
Reliability The inbuilt electric element guarantees a consistent and dependable supply of hot water, at all times. |
 |
Modular ‘Heat Pump Ready’ Design Upgrade from a standalone HydraHeat® electric cylinder to Hot Water Heat Pump Technology by adding the HydraHeat® head unit. |
 |
Easy Servicing Removable Heat Pump unit allows for easy servicing, and ensures uninterrupted supply of hot water. |
 |
Frost Protection Built-in defrost and frost protection functions to handle colder climates. |
 |
NZ MEPS Compliant MEPS (Minimum Energy Performance Standard) means less heat loss from unit and less energy use, resulting in a more efficient product. Not all Hot Water Heat Pumps in New Zealand are MEPS compliant. |
 |
Warranties 5-year heat pump unit warranty and a 7-year cylinder warranty. |
 |
User Friendly Control Interface Features OLED screen and six operation modes for versatility. |
 |
6 Operation Modes Standard, Boost, Eco 55, Eco 50, High Usage, and Element Only. |
 |
Ideal for a Range of Residential Styles Suitable for homes of 2–6 people. Plus an operating sound level of only 45dBA makes it suitable for a wide range of homes, including built-up residential areas. |
* Compared with a standard hot water cylinder in Zone 5 (Auckland). Annual energy performance estimated according to AS/NZS4234:2008 and AS/NZS5125:2014, medium load size.
** Inlet water temperature 19°C, Outlet Water temperature 55°C, Dry Bulb Temperature 19°C. Accredited Testing to AS/NZS 5125 Pending by NATA accredited Provider.
Product description
The Rinnai HydraHeat® is designed primarily for outdoor installations. It may be possible to install internally if the proposed location is not an occupied space as defined by AS/NZS 5149, consult a qualified installer prior to installation.
Scope of use
Primarily designed for residential applications, but can be used for smaller commercial applications.
Not suitable as a spa or swimming pool heater, or for hydronic applications. Hard and acidic water will need to be treated to use this product, refer water quality parameters in the support material (downloads).
RHPN361A275E20
275 L
4.7 W/W
(inlet water temp 19 ºC, outlet water temp. 55 ºC, ambient temp. 19 ºC) .
Accredited Testing to AS/NZS 5125 Pending by NATA accredited Provider.
802 W / 3725 W
In standard, eco 50/55 modes, the heat pump provides 100% of the heating within the operating range. Outside these limits the electric element will operate.
89 L/h
Recovery rate is calculated at Eco 55 mode, 19 ºC ambient temp., 41 ºC rise.
2 kW
Enamel
Positioned on the divider panel between the fan and compressor—to the right of the control panel.
-10 to 42 ºC
45 dB(A)
Sound pressure level measured at 1 m distance from the water heater in a free field. Appliance operated in standard mode (60 ºC) at an ambient temperature of 19 ºC.
R290 / 150 g (nominal charge)
IPX4 header and cylinder
Nov 2023
Hot water heat pumps, sometimes called hybrid heat pumps or heat pump water heaters, are designed to efficiently heat water for domestic and commercial use. They operate on the same principle as air source heat pumps, which extract heat from the surrounding air. This warms the water in the cylinder which is then supplied into your home or commercial space.
While hot water heat pumps offer long-term savings, the initial investment can be higher compared to traditional water heaters. It can cost upwards of $4,000 for the unit alone, and then more for proper installation from an experienced technician. This ensures that the heat pump is the correct size, placed correctly, and integrated with the existing plumbing.
Hot water heat pumps are regarded as the most environmentally friendly hot water solution in the market. They use heat in the air, reducing greenhouse gas emissions and dependence on fossil fuels. This makes them a viable choice for environmentally conscious individuals and organizations striving to minimize their carbon footprint.
Hot water heat pumps are significantly more energy-efficient than traditional electric or gas water heaters. They use renewable heat sources like air, which require less electricity to heat water. This leads to reduced energy consumption and lower bills.
Hot water heat pump systems should be serviced every two years. Installation, servicing, repair, and removal shall be carried out only by authorised personnel. They require minimal maintenance, primarily involving occasional checks and cleanings. This ease of maintenance adds to their appeal for both homeowners and businesses.
The space requirements for installing a hot water heat pump are a 400mm clearance on either side of the hot water heat pump, a 500mm clearance above the hot water heat pump and a 10mm clearance from the wall it is being installed against.
Unfortunately this is not possible, due to the specially designed technology that links the HydraHeat® hot water cylinder component to the heat pump head unit.
This guide outlines the available loan options and the application process, helping you install a top-quality for a warmer home and reliable hot water supply.
Read Article
R290 refrigerant, (a.k.a propane) has gained attention for its environmental benefits compared to traditional refrigerants - and here's why.
Read Article
Discover the benefits of a Rinnai HydraHeat™, the latest innovation in hot water heat pumps, made in NZ.
Read Article
